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Method for powering elements connected in a two-wire bus network transmitting both power supply and data information pulses

  • US 5,974,553 A
  • Filed: 07/30/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 07/31/1996
  • Status: Expired due to Term
First Claim
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1. A method for powering elements connected in a two-wire bus type network wherein information frames of predetermined length are transmitted at predetermined times and wherein the bus includes terminal impedances, said method including the steps of regularly issuing on the two-wire bus a power supply pulse between the end of an information frame and the beginning of the next frame;

  • disconnecting the terminal impedances when the amplitude of the power supply pulse exceeds a threshold value associated with a rising edge of the supply pulse; and

    reestablishing the connection of the terminal impedances to the bus during a falling edge of the supply pulse.

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